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Mechanics
Mechanics is the branch of physics that deals with the interactions of objects and forces in the observable world. Questions asking about projectile motion, conservation of energy, and calculus based mechanics are perfect for this topic, but questions about repairs that a mechanic would do belong in our vehicles categories.
2,416 Questions
How many miles per minute is 18 miles per hour?
To convert 18 miles per hour to miles per minute, divide by 60 (since there are 60 minutes in an hour).
(18 \text{ miles per hour} = \frac{18}{60} = 0.3 \text{ miles per minute}).
What tool is used to measure when a liquid becomes a solid?
Eyes and sense of touch,
Ice pick.
A More Technical Perspective:
In a laboratory setting the change of state between a liquid and a solid is marked by a loss of heat energy while the temperature of the material remains the same. This is due to the energy surrendered by the material as its molecules take on a more "energy economic" configuration. As a consequence the devices need would be a thermometer to measure temperature change and a calorimeter to measure the rate of heat loss.
Alternately the freezing point could be determined by plotting temperature change (with a thermometer) with time in a constant temperature bath. The freezing point would be marked by a flat section in the graph as heat was released by crystallization rather than heat lost due to heat capacity.
How long does it take for a Delorean to reach 88 miles per hour on its oun power?
A stock DeLorean DMC-12 would take around 25-30 seconds to reach 88 miles per hour on its own power.
Decreasing the surface area in contact with the table will increase the pressure at that contact point. This can lead to an increase in the coefficient of kinetic friction, as the roughness at the microscopic level can become more significant.
How many hours equal 1098 miles at 70 miles per hour?
To calculate the time taken to cover 1098 miles at 70 miles per hour, you divide the total distance by the speed. So, 1098 miles / 70 miles per hour = approximately 15.69 hours.
How many mph equal one G force?
You can not equate miles per hour to G forces. If you were traveling at 1000 mph, for example, but at a constant speed, you would fell no extra force since you are not accelerating.
What would the world be like without friction?
Trivial Effects of a World Without The Limiting Force of Friction:
Automobiles, ships, and most aircraft would be useless: If you could ever get them moving, steering would be impossible, and stopping safely would be almost impossible. It would be worse than trying to move around on slick, wet ice everywhere. Everything would have to be tethered (tied down). It would be very difficult, or impossible, to pick up a coin from a flat surface. It would be difficult to pick up, and hold, a glass of water, and to keep from spilling it.
Without Friction, There Would Be No life.
There would be many other consequences as well, in a frictionless world. Everyone, and everything not tied down, would be sliding all over the place, including the water in our lakes, rivers and oceans. Gravity would become the defining force, and the continents would become unstable and easy prey to it. Indeed, life itself would quickly become doubtful at best, but almost certainly, impossible.
Others Have Said:
The world with no friction would be chaos. Nothing would stay where you put it. Everything would slide around. With friction, most things stay where you leave them, except things like a ball on a slope.
You would never feel the wind again. Meteorites would not slow down, liquefy, or break up before hitting Earth, so each would strike Earth's surface with greater mass, and more force than friction would allow.
Basketball would be really entertaining to watch, but not fun to play. Friction allows the players' shoes to grip the floor, and their hands to grip the ball. Without friction they'd be falling down all the time and they couldn't hang onto the ball, much less catch it.
In a frictionless world, if a ball were rolled (set in motion), it would never stop rolling. Walking or standing would be impossible. Obviously, everything concerning Earth's surface, and how we use it, would be very different.
When does is an object at zero velocity only for an instant but its acceleration is not zero?
this case is observed when you throw a ball at a wall.the ball comes to momentary rest after after striking the wall.but it experiences a retarding force.at that time the retarding force is non zero,so acceleration is non zero.but velocity is zero.same is the case when you throw an object up into air.there is constant acceleration of 9.8m/s^2 but at the top of trajectory the velocity is zero.
Is it true that the net force acting on an object is equal to the rate of change of its momentum?
Yes, that statement is a concise way of expressing Newton's second law of motion. The net force acting on an object is indeed equal to the rate of change of its momentum. This relationship helps explain how forces cause objects to accelerate or change direction.
How do you convert 55 feet per second to miles per hour?
To convert 55 feet per second to miles per hour, you would first need to convert feet to miles by dividing by 5280 (since 1 mile = 5280 feet). Then, multiply the result by 3600 (since there are 3600 seconds in an hour) to get the speed in miles per hour. In this case, 55 feet per second is approximately equal to 37.5 miles per hour.
Yes, a force acting perpendicular to a horizontal force on a body can cancel out the horizontal force if the two forces are equal in magnitude and opposite in direction. This is known as the equilibrium condition, where the net force acting on the body is zero.
The misplaced modifier in the sentence is "Around the corner." It should be placed next to the word it is modifying, most likely "sign," to clarify that the sign, not the corner, reads forty-five miles per hour.
The velocity of a deepwater wave can be calculated using the formula v = L/T, where v is the velocity, L is the wavelength (50 meters), and T is the period (6.5 seconds). Substituting the values gives v = 50 meters / 6.5 seconds ≈ 7.69 m/s.
Does water temperature change after using alka seltzer?
According to the law of conservation of mass, no it doesn't. It doesn't all stay in the glass, though; some of it escapes into the atmosphere as CO2 but if you were to capture that, you'd have all the mass you started with.
for lifting the object there is no role of friction,but of air friction.since no info,. is given about it so air friction = 0.thereby for lifting we have mg = mass * 9.8 (the wight of the object). and for sliding we have 0.3*mg . therefore 0.7mg of more force is required to lift it.
What causes white smoke out of your exhaust at 75 miles per hour or more?
White smoke at high speeds may indicate a coolant leak into the combustion chamber or a problem with the fuel injector. It is recommended to have the vehicle inspected by a mechanic to determine the exact cause and address the issue promptly to prevent further damage.
What makes the whistling noise on bombs as they fall?
If you've ever seen a bomb you will notice that there are tail-fins. There are two purposes to these fins.
- To make the bomb fall where it is intended to go. Hitting a target with a bomb is a hard thing to do and a lot of technology goes into making a bomb the right shape to 'fall straight.'
- These tail-fins are also modified to make the screaming sound as they fall; to add a dimension of terror to a bombing raid.
Movement of an all object is compared with a?
The movement of an object is compared with a reference point or frame of reference to determine its speed, velocity, and acceleration. This comparison helps to understand the object's motion relative to a fixed point or another moving object.
How high does the average slingshot shoot?
The average slingshot can shoot projectiles at speeds of around 100-200 feet per second (30-60 meters per second). This typically translates to a maximum range of 100-200 yards (90-180 meters) depending on the design and quality of the slingshot.
Why after 24 hours helium balloon won't fly what is happening with the helium?
Helium atoms are very small and able to diffuse through the balloon material over time, leading to a loss of buoyancy. As a result, the balloon becomes deflated and unable to lift the weight of the rubber and any attachments.
Values of static and dynamic coefficient of friction for concrete to soil?
The static coefficient of friction between concrete and soil typically ranges from 0.6 to 1.0, while the dynamic coefficient of friction is usually slightly lower, ranging from 0.5 to 0.8. These values can vary based on factors such as the roughness of the surfaces and the presence of any contaminants like water or debris.
The typical BREAKING distance from 50mph is 38meters, but the overall stopping distance is 53meters (overall stopping distance is made up of thinking distance, which is 15meters in this case, + breaking distance)
Sports where friction is either supporting or opposing these games?
Skiing and snowboarding (Skis rubbing against snow slows them down)
Skateboarding (Rolling friction, it's a matter of opinion if it supports or opposes them)
Swimming (fluid friction makes it harder for them to swim against it)
Those are just a few.
Sound waves travel by vibrations in what?
Sound is energy of mechanical vibration transferred through a medium.
Commonly the medium is air, but solids, liquids and gasses all transmit sound. Indeed, sound travels faster through liquid and solids than through gas.
Sound does not propagate through a vacuum.
Ken ran a total of 31.5 miles (4.5 hours * 7 miles per hour = 31.5 miles).
